IPv4 Subnet Calculator

Enter an IP with a CIDR prefix or a subnet mask to see its network, broadcast, host range, and host count. You can also split the network into smaller subnets.

Try:192.168.1.10/24 10.0.0.0/8 172.16.5.4/20 203.0.113.9/29

IPv6 calculator →

private IP (RFC 1918)10.1.112.0/22

network10.1.112.0/22

broadcast10.1.115.255

first host10.1.112.1

last host10.1.115.254

subnet mask255.255.252.0

wildcard0.0.3.255

addresses1,024

usable hosts1,022

classA

ipcalc 10.1.112.0/22

address00001010.00000001.01110000.00000000

subnet mask11111111.11111111.11111100.00000000

network00001010.00000001.01110000.00000000

broadcast00001010.00000001.01110011.11111111

green = network part, grey = host part

hex0x0a017000

decimal167866368

reverse dns0.112.1.10.in-addr.arpa

ipv4-mapped::ffff:a01:7000

/22 split into /28 · 64 subnets

close ×

#	network	host range	broadcast
1	10.1.112.0/28	10.1.112.1 – 10.1.112.14	10.1.112.15
2	10.1.112.16/28	10.1.112.17 – 10.1.112.30	10.1.112.31
3	10.1.112.32/28	10.1.112.33 – 10.1.112.46	10.1.112.47
4	10.1.112.48/28	10.1.112.49 – 10.1.112.62	10.1.112.63
5	10.1.112.64/28	10.1.112.65 – 10.1.112.78	10.1.112.79
6	10.1.112.80/28	10.1.112.81 – 10.1.112.94	10.1.112.95
7	10.1.112.96/28	10.1.112.97 – 10.1.112.110	10.1.112.111
8	10.1.112.112/28	10.1.112.113 – 10.1.112.126	10.1.112.127
9	10.1.112.128/28	10.1.112.129 – 10.1.112.142	10.1.112.143
10	10.1.112.144/28	10.1.112.145 – 10.1.112.158	10.1.112.159
11	10.1.112.160/28	10.1.112.161 – 10.1.112.174	10.1.112.175
12	10.1.112.176/28	10.1.112.177 – 10.1.112.190	10.1.112.191
13	10.1.112.192/28	10.1.112.193 – 10.1.112.206	10.1.112.207
14	10.1.112.208/28	10.1.112.209 – 10.1.112.222	10.1.112.223
15	10.1.112.224/28	10.1.112.225 – 10.1.112.238	10.1.112.239
16	10.1.112.240/28	10.1.112.241 – 10.1.112.254	10.1.112.255
17	10.1.113.0/28	10.1.113.1 – 10.1.113.14	10.1.113.15
18	10.1.113.16/28	10.1.113.17 – 10.1.113.30	10.1.113.31
19	10.1.113.32/28	10.1.113.33 – 10.1.113.46	10.1.113.47
20	10.1.113.48/28	10.1.113.49 – 10.1.113.62	10.1.113.63
21	10.1.113.64/28	10.1.113.65 – 10.1.113.78	10.1.113.79
22	10.1.113.80/28	10.1.113.81 – 10.1.113.94	10.1.113.95
23	10.1.113.96/28	10.1.113.97 – 10.1.113.110	10.1.113.111
24	10.1.113.112/28	10.1.113.113 – 10.1.113.126	10.1.113.127
25	10.1.113.128/28	10.1.113.129 – 10.1.113.142	10.1.113.143
26	10.1.113.144/28	10.1.113.145 – 10.1.113.158	10.1.113.159
27	10.1.113.160/28	10.1.113.161 – 10.1.113.174	10.1.113.175
28	10.1.113.176/28	10.1.113.177 – 10.1.113.190	10.1.113.191
29	10.1.113.192/28	10.1.113.193 – 10.1.113.206	10.1.113.207
30	10.1.113.208/28	10.1.113.209 – 10.1.113.222	10.1.113.223
31	10.1.113.224/28	10.1.113.225 – 10.1.113.238	10.1.113.239
32	10.1.113.240/28	10.1.113.241 – 10.1.113.254	10.1.113.255
33	10.1.114.0/28	10.1.114.1 – 10.1.114.14	10.1.114.15
34	10.1.114.16/28	10.1.114.17 – 10.1.114.30	10.1.114.31
35	10.1.114.32/28	10.1.114.33 – 10.1.114.46	10.1.114.47
36	10.1.114.48/28	10.1.114.49 – 10.1.114.62	10.1.114.63
37	10.1.114.64/28	10.1.114.65 – 10.1.114.78	10.1.114.79
38	10.1.114.80/28	10.1.114.81 – 10.1.114.94	10.1.114.95
39	10.1.114.96/28	10.1.114.97 – 10.1.114.110	10.1.114.111
40	10.1.114.112/28	10.1.114.113 – 10.1.114.126	10.1.114.127
41	10.1.114.128/28	10.1.114.129 – 10.1.114.142	10.1.114.143
42	10.1.114.144/28	10.1.114.145 – 10.1.114.158	10.1.114.159
43	10.1.114.160/28	10.1.114.161 – 10.1.114.174	10.1.114.175
44	10.1.114.176/28	10.1.114.177 – 10.1.114.190	10.1.114.191
45	10.1.114.192/28	10.1.114.193 – 10.1.114.206	10.1.114.207
46	10.1.114.208/28	10.1.114.209 – 10.1.114.222	10.1.114.223
47	10.1.114.224/28	10.1.114.225 – 10.1.114.238	10.1.114.239
48	10.1.114.240/28	10.1.114.241 – 10.1.114.254	10.1.114.255
49	10.1.115.0/28	10.1.115.1 – 10.1.115.14	10.1.115.15
50	10.1.115.16/28	10.1.115.17 – 10.1.115.30	10.1.115.31
51	10.1.115.32/28	10.1.115.33 – 10.1.115.46	10.1.115.47
52	10.1.115.48/28	10.1.115.49 – 10.1.115.62	10.1.115.63
53	10.1.115.64/28	10.1.115.65 – 10.1.115.78	10.1.115.79
54	10.1.115.80/28	10.1.115.81 – 10.1.115.94	10.1.115.95
55	10.1.115.96/28	10.1.115.97 – 10.1.115.110	10.1.115.111
56	10.1.115.112/28	10.1.115.113 – 10.1.115.126	10.1.115.127
57	10.1.115.128/28	10.1.115.129 – 10.1.115.142	10.1.115.143
58	10.1.115.144/28	10.1.115.145 – 10.1.115.158	10.1.115.159
59	10.1.115.160/28	10.1.115.161 – 10.1.115.174	10.1.115.175
60	10.1.115.176/28	10.1.115.177 – 10.1.115.190	10.1.115.191
61	10.1.115.192/28	10.1.115.193 – 10.1.115.206	10.1.115.207
62	10.1.115.208/28	10.1.115.209 – 10.1.115.222	10.1.115.223
63	10.1.115.224/28	10.1.115.225 – 10.1.115.238	10.1.115.239
64	10.1.115.240/28	10.1.115.241 – 10.1.115.254	10.1.115.255

01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefix	subnet mask	addresses	hosts	in your /22
/0	0.0.0.0	4,294,967,296	4,294,967,294	-
/1	128.0.0.0	2,147,483,648	2,147,483,646	-
/2	192.0.0.0	1,073,741,824	1,073,741,822	-
/3	224.0.0.0	536,870,912	536,870,910	-
/4	240.0.0.0	268,435,456	268,435,454	-
/5	248.0.0.0	134,217,728	134,217,726	-
/6	252.0.0.0	67,108,864	67,108,862	-
/7	254.0.0.0	33,554,432	33,554,430	-
/8	255.0.0.0	16,777,216	16,777,214	-
/9	255.128.0.0	8,388,608	8,388,606	-
/10	255.192.0.0	4,194,304	4,194,302	-
/11	255.224.0.0	2,097,152	2,097,150	-
/12	255.240.0.0	1,048,576	1,048,574	-
/13	255.248.0.0	524,288	524,286	-
/14	255.252.0.0	262,144	262,142	-
/15	255.254.0.0	131,072	131,070	-
/16	255.255.0.0	65,536	65,534	-
/17	255.255.128.0	32,768	32,766	-
/18	255.255.192.0	16,384	16,382	-
/19	255.255.224.0	8,192	8,190	-
/20	255.255.240.0	4,096	4,094	-
/21	255.255.248.0	2,048	2,046	-
/22	255.255.252.0	1,024	1,022	1
/23	255.255.254.0	512	510	2 split →
/24	255.255.255.0	256	254	4 split →
/25	255.255.255.128	128	126	8 split →
/26	255.255.255.192	64	62	16 split →
/27	255.255.255.224	32	30	32 split →
/28	255.255.255.240	16	14	64 split →
/29	255.255.255.248	8	6	128 split →
/30	255.255.255.252	4	2	256 split →
/31	255.255.255.254	2	2	512 split →
/32	255.255.255.255	1	1	1,024 split →

02 / faq

About this calculator.

How do I use this subnet calculator?

▼

Type an IP address followed by a prefix, like 192.168.1.10/24, or by a subnet mask, like 192.168.1.10 255.255.255.0. Without a prefix it uses /24. Click a row in the table to split the network into smaller subnets.

Why are usable hosts always 2 fewer?

▼

The first address in a subnet is the network address and the last is the broadcast address, so neither can go to a device. The exceptions are /31 (point-to-point links, RFC 3021) and /32 (a single address), which use every address.

Can I use it from a terminal?

▼

Yes. curl 'ipku.in/en/tools/ipv4-subnet-calculator?q=192.168.1.10/24' returns the result as plain text.

Learn how to work it out →